How to Control Your Cortisol & Overcome Burnout

What It Covers

Andrew Huberman explains cortisol's role beyond stress response, detailing how to optimize its 24-hour rhythm through light exposure, exercise timing, nutrition, and specific protocols to boost morning energy while ensuring low evening levels for quality sleep.

Key Questions Answered

• •Cortisol awakening response: View bright sunlight within 30 minutes of waking to increase morning cortisol by up to 50 percent. This early peak triggers negative feedback that naturally lowers cortisol by evening, improving sleep quality. Use 10,000 lux artificial light if sunlight unavailable.
• •Caffeine timing strategy: Delay caffeine intake 60-90 minutes after waking if experiencing afternoon crashes. For habitual users, caffeine extends cortisol's half-life rather than spiking levels, creating a more gradual decline throughout the day and preventing energy drops around 2-3 PM.
• •Exercise entrainment effect: Train within the same 2-3 hour window at least 4 days weekly to create anticipatory cortisol rises before workouts. This consistent timing anchors the circadian rhythm, generating natural energy increases 60 minutes before scheduled exercise without additional stimulation.
• •Grapefruit cortisol extension: Consuming one grapefruit or 6-8 ounces of juice extends cortisol duration by 25-50 percent by inhibiting the CYP3A4 enzyme that breaks down cortisol. Eat during late morning to sustain energy into early afternoon without additional stimulants.
• •Evening light management: Dim overhead lights and switch to red or amber wavelengths 2 hours after sundown. Short wavelength blue-green light from screens dramatically increases cortisol when baseline levels are low, disrupting melatonin production and preventing quality sleep onset.